WO2019240443A1 - Simultaneous inspection device of multiple secondary battery cell pouches - Google Patents

Abstract

The present invention relates to a simultaneous inspection device of multiple secondary battery cell pouches, the simultaneous inspection device comprising: a support member installed for support; a movable member installed to face the support member; multiple pressure panels which are installed side by side between the support member and the movable member, and combined so that the gap between them can be adjusted by the back and forth movement of the movable member wherein the secondary battery cell pouches are inserted into each gap; a guide member for guiding the pressing panels to move in the direction necessary for adjusting the gaps; and a pressure driving unit for moving the movable member back and forth to pressurize and pressure-release the secondary battery cell pouch between the pressurizing panels on both sides.

Description

Multiple secondary battery cell pouch simultaneous inspection device

This application claims the benefit of priority based on Korean Patent Application No. 10-2018-0066651 filed on June 11, 2018 and Korean Patent Application No. 10-2018-0144260 filed on November 21, 2018. All contents disclosed are included as part of this specification.

The present invention relates to a plurality of secondary battery cell pouches simultaneous inspection apparatus, and more specifically, a plurality of secondary battery cell pouches can be easily and quickly inspect the defects caused by the internal membrane damage or foreign matters. The present invention relates to a plurality of secondary battery cell pouch simultaneous inspection apparatuses for improving the reliability of secondary battery cell pouch quality.

In general, secondary batteries are rechargeable and have a large capacity, such as nickel cadmium, nickel hydrogen, and lithium secondary batteries. Among them, lithium secondary batteries have been in the spotlight for advantages such as free charge and discharge, very low self discharge rate, and high energy density compared to nickel-based secondary batteries. In general, such a secondary battery may be classified into a cylindrical or square can-type secondary battery and a pouch-type secondary battery according to an exterior material or an application form.

The pouch type secondary battery uses a pouch packaging material composed of a metal layer (foil) and a multilayer film of a synthetic resin layer coated on the upper and lower surfaces of the metal layer, and thus, the weight of the battery is greater than that of a cylindrical or square using a metal can. It is possible to significantly reduce the weight of the battery can be reduced, and has the advantage that it can be changed in various forms has attracted a lot of attention. Its usage is also gradually increasing.

The secondary battery is manufactured by accommodating an electrode assembly of a cathode / separation membrane / cathode in a battery container such as a pouch, injecting an electrolyte solution, and then sealing the battery container, during or during the assembly of the electrode assembly or the secondary battery. Defects can occur due to various causes. Among these, a phenomenon in which a battery which has been manufactured shows a voltage drop behavior higher than a self discharge rate is referred to as low voltage failure. The low voltage defect is often caused by a metal foreign matter present in the secondary battery, which may cause an internal short circuit of the secondary battery, and as a result, the secondary battery may fail, damage, or ignite.

Therefore, the secondary battery should be operated so that defects can be eliminated at the source by inspecting whether there is a defect including insulation, and the related art is related to the method of "Insulation Testing of Pouch Battery Cells" of Korean Patent Publication No. 10-2010-0044407. And a system ", which includes a loading step of loading the pouch battery cell on a lower support for supporting the bottom surface of the pouch battery cell; Contacting the probe with a pouch side part of the stacked pouch battery cell and an electrode of the pouch battery cell; And a measuring step of measuring electrical property values between the contacted probes.

However, such a conventional technique is carried out using a separate lower and upper support, but in the end, the probe means of the measuring device is brought into contact with the electrode of the pouch battery cell or the like to check the insulation through resistance measurement. When performing the inspection by hand, there was a problem that there is a limit to increase the accuracy and reliability of the inspection.

In addition, the prior art has not only to perform the inspection by hand, even by individually inspecting each one of the pouch battery cells, there was a problem that the efficiency of the inspection is significantly low.

In particular, the pouch type secondary battery may cause damage to an internal separator in a manufacturing process, and may cause an internal short circuit of the secondary battery due to damage of the separator. Therefore, in order to improve the quality and reliability of such a secondary battery, it is necessary to check the damage of the separator. However, the pouch-type battery cell is not easy to present a device that can accurately determine the damage of the separator separately by connecting to the electrodes of each of the plurality of pouch battery cells due to the plate-like structure characteristics. Therefore, it is necessary to develop an inspection apparatus to solve this problem.

In order to solve the above problems of the prior art, the present invention allows to easily and quickly inspect whether a plurality of secondary battery cell pouches are damaged inside the separator, thereby increasing the reliability of the secondary battery cell pouch. The purpose of the present invention is to increase the efficiency and accuracy of the inspection of a plurality of secondary battery cell pouches and to minimize the installation space limitation by constructing the device in a compact size compared to the number of simultaneous inspections of the secondary battery cell pouches. have.

In order to solve the above problems, according to an aspect of the present invention, the support member is installed for support; A movable member installed to face the support member; A plurality of side by side between the support member and the movable member is installed, coupled to each other by the front and rear movement of the movable member is coupled to each other, the cell pouch of the secondary battery is inserted into the gap formed between each A pressure panel; A guide member for guiding the pressing panel to move in the direction of the gap adjustment; And a pressurizing driver configured to pressurize and depressurize the secondary battery cell pouches between the pressing panels by moving the movable member back and forth on both sides thereof.

An inspection apparatus according to an exemplary embodiment of the present disclosure may include: a current inspecting unit configured to apply a voltage to each of the plurality of secondary battery cell pouches and measure a current of the cell pouches; It may further include.

An inspection apparatus according to an embodiment of the present invention includes an electrode module connected to each of the electrode terminals of a secondary battery cell pouch disposed in the gap to apply or receive current; It may further include.

The pressing panel has a connecting link having a guide hole extending in the direction of the gap adjustment is fixed to both sides, the connecting pin is inserted into the guide hole formed in the connecting link of the other pressing panel facing the gap, both sides By being provided in each part, a plurality is coupled to each other so that the gap is adjusted by the connecting link and the connecting pin arranged alternately up and down, the sliding member is provided with the guide member is slidably coupled, some of the plurality A support roller may be provided to be supported on the ground by the roller coupling portion at the lower side of the support roller.

The electrode module may be installed in plurality between the pressing panels and move together with the pressing panel by being fixed to the pressing panel.

The electrode module may include a fixing member fixed to one side of the pressing panel; An electrode actuator fixed to the fixing member, the electrode actuator having a movable tip disposed in the gap adjusting direction to adjust a gap; Fixing pieces fixed to each of the movable tips; And an electrode connection part provided on each of the fixing pieces so as to face each other, such that the electrode contact parts are in surface contact with both side surfaces of the electrode terminals of the secondary battery cell pouch by driving the electrode actuator. It may include.

The electrode module is installed in a mounting groove formed in the pressing panel, a guide hole extending in the width direction of the secondary battery cell pouch is formed in the fixing member, and inserted into the desired position in the guide hole to be mounted. The fixing position may be varied in the width direction by a fixing bolt screwed into the groove.

The current inspection unit may include a power supply for applying a voltage such that the cell pouch pressurized by the pressure panel reaches a voltage in a predetermined range; And a current measuring unit for measuring the current value of the cell pouch; It may include.

The pressure driving unit, a drive motor for providing a driving force; A drive timing pulley rotated by the drive motor; Guide pulleys respectively installed side by side on both sides of the driving timing pulley; Driven timing pulleys which are respectively installed side by side on both sides of the driving timing pulley; A timing belt connected to the driven timing pulley from the driving timing pulley so as to be guided to the guide pulley and transmitting a rotational force; And a lead screw fixed to each of the driven timing pulleys to rotate together, screwed through both sides of the movable member, and inserted into the through hole of the pressure panel.

It may further include a guide portion installed on the pressure panel to guide the entry and exit of the secondary battery cell pouch with respect to the gap.

The guide portion, the support shaft is installed vertically upward from the upper end of the pressing panel; A guide tip provided on the support shaft so as to decrease in width upward; And hinge hinges each having an upper end hinged with hinge pins on both sides of the guide tip to be disposed toward the gap side, and having a “◁” shape so that a central portion protrudes toward the gap side.

An elastic support part elastically supporting the support member so as to be restored to the pressing panel side, wherein the elastic support part comprises: a fixed panel fixed to face the support member; And a compression spring inserted into the guide member so as to be positioned between the fixing panel and the support member.

In addition, the inspection apparatus of the present invention is connected to the pressure driving unit and the current inspection unit, respectively, and controls each operation of the pressure driving unit and the current inspection unit, and compares the current value and the reference value measured by the current inspection unit to determine whether or not defective. The control unit may further include a.

The controller may determine whether there is a defect by comparing the average value and the reference value of the current value measured by the current tester for 2 to 10 seconds.

In addition, the inspection apparatus of the present invention may further include a pressure pad or a pressing piece attached to one side or both sides of the pressure panel.

According to the plurality of secondary battery cell pouches simultaneous inspection apparatus according to the present invention, it is possible to easily and quickly inspect the internal membrane damage of the plurality of secondary battery cell pouch, thereby improving the reliability of the secondary battery cell pouch. In addition, the efficiency and accuracy of the inspection of a plurality of secondary battery cell pouches can be increased, and the size of the device can be made compact compared to the number of simultaneous inspections of the secondary battery cell pouches, thereby minimizing the securing of installation space. .

1 is a perspective view illustrating a plurality of secondary battery cell pouch simultaneous inspection apparatus according to an exemplary embodiment of the present invention.

2 is a perspective view illustrating a plurality of secondary battery cell pouch simultaneous inspection devices according to an exemplary embodiment from different directions.

3 is a side view illustrating a plurality of secondary battery cell pouch simultaneous inspection apparatus according to an exemplary embodiment of the present invention.

4 is a perspective view illustrating a pressing panel in a plurality of secondary battery cell pouches simultaneously testing apparatus according to an embodiment of the present invention.

FIG. 5 is a perspective view illustrating a pressure panel in different directions in a plurality of secondary battery cell pouch simultaneous inspection apparatuses according to an exemplary embodiment.

6 is a perspective view illustrating an electrode module in a plurality of secondary battery cell pouch simultaneous inspection apparatuses according to an exemplary embodiment of the present invention.

7 is a perspective view illustrating an electrode module in a different direction in a plurality of secondary battery cell pouch simultaneous inspection apparatuses according to an exemplary embodiment of the present invention.

8 is a perspective view illustrating a pressurizing driver in a plurality of secondary battery cell pouch simultaneous inspection apparatuses according to an exemplary embodiment of the present invention.

9 is a side view illustrating a slot open state and an electrode open state of a plurality of secondary battery cell pouch simultaneous inspection apparatuses according to an exemplary embodiment.

10 is a perspective view illustrating an open state of an electrode module in a plurality of secondary battery cell pouch simultaneous inspection devices according to an exemplary embodiment of the present invention.

FIG. 11 is a side view illustrating slot closed and electrode closed states of a plurality of secondary battery cell pouch simultaneous inspection apparatuses according to an exemplary embodiment.

12 is a perspective view illustrating a closed state of an electrode module in a plurality of secondary battery cell pouch simultaneous inspection apparatuses according to an exemplary embodiment of the present invention.

Since the present invention may have various embodiments by various changes, specific embodiments will be described by way of example in the drawings. In addition, it is to be understood that the present invention is not limited to these specific embodiments, but includes all modifications, equivalents, and substitutes included in the technical idea of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same reference numerals are assigned to the same or corresponding components regardless of the reference numerals, and redundant description thereof will be omitted. Shall be.

In the present invention, a cell pouch is a battery cell in which an electrode assembly is inserted into a pouch-type exterior material, an electrode assembly is inserted into a pouch-type exterior material, and the electrode assembly is inserted into a battery cell and a pouch-type exterior material in which the electrolyte is injected, and the electrolyte is injected. After that, the concept includes all of the battery cells in a state of completing the sealing.

1 is a perspective view showing a plurality of secondary battery cell pouch simultaneous inspection apparatus according to an embodiment of the present invention, Figure 2 is a plurality of secondary battery cell pouch simultaneous inspection apparatus according to an embodiment of the present invention from another direction Figure 3 is a perspective view, Figure 3 is a side view showing a plurality of secondary battery cell pouch simultaneous inspection apparatus according to an embodiment of the present invention.

1 to 3, a plurality of secondary battery cell pouch simultaneous inspection apparatus 100 according to an embodiment of the present invention includes a support member 110, a movable member 120, a pressure panel 130, and a guide member. 140 and the pressure driving unit 160 may be included.

The support member 110 is installed to support, for example, may be installed perpendicular to the frame 180 is installed on the ground, as another example may be installed to be elastically supported by the elastic support 190 as in this embodiment. have. The frame 180 may include, for example, a base frame 181 lying on the ground and a pair of support frames 182 provided on both sides of the base frame 181 to face each other.

The elastic support unit 190 elastically supports the support member 110 so as to be restored to the pressure panel 130 side, thereby buffering the impact applied to the secondary battery cell pouches 1 between the pressure panel 130 and thereby, the secondary battery cell pouch. (1; shown in Figs. 9 to 12) can be prevented from being broken by the impact during the pressurization. The elastic support 190 is, for example, the fixing panel 191 fixed to face the support member 110, as in the present embodiment, the guide member 140 to be located between the fixed panel 191 and the support member 110. It may include a compression spring 192 is inserted into. Here, the fixing panel 191 may be vertically fixed on the base frame 181. In this case, the support member 110 may be vertically installed to be elastically supported by the compression spring 192 in a state where the guide member 140 penetrates to face the fixed panel 191.

In addition, when the pressure panel 130 presses a plurality of secondary battery cell pouches 1, a load cell (not shown) is interposed between the fixed panel 191 and the support frame 182 to measure the pressing force. Can be. If the pressure applied to the cell pouch is too high, the electrode may detach or the appearance of the cell pouch may be damaged. On the contrary, if the pressure is too low, the anode and the cathode may not be physically brought into contact with each other. Since this may fall, by sensing the pressure applied to the cell pouch 1 through the load cell, it is possible to determine whether an appropriate level of pressure is applied.

The movable member 120 is installed to face the support member 110 and moves back and forth by the pressure driving unit 160 to pressurize and depressurize the pressure panel 130.

3 to 5, the pressure panel 130 is installed vertically in parallel with each other between the support member 110 and the movable member 120, and is spaced from each other by the forward and backward movement of the movable member 120. It is coupled to be adjustable, and the cell pouch 1 (shown in FIGS. 9 and 10) of the secondary battery is inserted into a gap formed therebetween. The pressure panel 130 is, for example, the connection link 131 having a guide hole 131a extending in the direction of the gap adjustment is fixed to both sides, the connection link of the other pressure panel 130 facing the gap ( The connecting pins 132 inserted into the guide holes 131a formed in the 131 are respectively provided at both sides thereof, so that the gap is adjusted by the connecting links 131 and the connecting pins 132, which are alternately arranged up and down. The sliding coupling portion 133 coupled to each other and coupled to the guide member 140 to slidably may be provided. Here, when the plurality of pressure panel 130 is coupled by the connecting link 131 and the connecting pin 132, as shown in Figure 3, so that the connecting link 131 and the connecting pin 132 are alternately arranged up and down. In this case, it is possible to avoid the interference between each other when the link link 131 and the connecting pins 132 are arranged in a line, and each of the plurality of sides, for example, two connecting link 131 and the connecting pin ( 132 may be provided.

The pressure panel 130 is coupled to each other by the connection link 131 and the connecting pin 132, as described above, in order to be coupled to each other by the front and rear movement of the movable member 120 to be adjustable. The pressure panel 130 adjacent to the member 120 may be attached by bolting, bonding, or fitting.

In order to effectively pressurize the secondary battery cell pouch 1, a pressing pad 136 or a pressing piece 137 may be provided on one side or both sides of the pressing panel.

Referring to FIG. 4, the pressure pad 136 is attached to one surface of the pressure panel 130. The pressure pad 136 presses the body part of the cell pouch 1 as a whole. Here, the cell pouch body part refers to the body portion of the cell pouch except for the electrode terminal drawn out from the cell pouch.

On the other hand, in order to effectively press the site where the defect is predicted, a pressing piece 137 having a stripe shape having a predetermined width may be attached to a predetermined site of the pressing panel 130. Since the separator defect of the secondary battery mainly occurs at four corner portions of the cell pouch body portion, the pressing piece 137 is attached to the portion of the pressing panel 130 corresponding to the edge of the cell pouch body portion.

Referring to FIG. 5, the pressing pieces 137 have a predetermined width and extend in a direction orthogonal to the direction in which the electrode terminals extend, and the pair of pressing pieces 137 is formed on the left and right sides of the pressing panel 130. It is attached to both ends. By properly selecting the attachment position of the pressing piece 137 as described above, the pressing panel 130 can effectively press the edge portion of the body portion of the cell pouch (1).

Meanwhile, unlike the embodiment of FIG. 5, a pair of pressing pieces 137 having a predetermined width may be attached to upper and lower ends of the pressing panel 130. In addition, the shape of the pressing piece is not limited to a stripe shape, but may have a shape of a square ring in which voids are formed in a central portion thereof.

4 and 5 illustrate an embodiment in which a pressure pad is attached to one surface of the pressure panel, and a pair of pressure pieces are attached to the other surface. Alternatively, the pressure pad may be attached only to one surface of the pressure panel. Alternatively, the pressing piece may be attached only to one surface of the pressing panel.

The shape and size of the pressing pad and the pressing piece may be appropriately selected according to the size of the secondary battery cell pouch to be inspected, the size of the separator defect, and the location of the pressing pad. In addition, the thickness of the pressing pad and the pressing piece may have a thickness of 1 to 10mm, preferably 3 to 9mm, more preferably 5 to 8mm. Here, the thickness may be defined as the length of the pressing pad or the pressing piece corresponding to the interval from the pressing panel to the cell pouch. In the case of the thickness or being too thin, it is not preferable to effectively press the defective part. The edges may be damaged.

The material of the pressure pad and the pressing piece is not particularly limited, but a material having a too high hardness may leave a mark on the appearance of the cell pouch and may not be effective for physical contact between the positive electrode and the negative electrode. Conversely, materials with too low hardness are easily deformed during repeated use, making it difficult to maintain and increasing the contact area with the cell pouch, which can damage the cell pouch. A rubber or elastic synthetic polymer material capable of expressing a sufficiently pressurizing effect without fear of damage to the appearance of the cell pouch is preferable, and a specific example of the elastic synthetic polymer may be a polyurethane-based polymer material.

In addition, the pressure panel 130 may be provided such that the support roller 138 is supported on the ground by the roller coupling portion 138a at a lower portion of the plurality. Accordingly, the pressing panel 130 assembly may be stably moved on the base frame 181 by the support roller 138.

The guide member 140 guides the pressing panel 130 to move in the direction of adjusting the spacing. For this purpose, both ends of the supporting frame 182 of the frame 180 are placed so as to be placed in the arrangement direction of the pressing panel 130. It may be made of a shaft member that is fixed to, a plurality of may be provided side by side as in this embodiment. The pressure panel 130 may be provided with a sliding coupling member 133, such as a bearing corresponding to each of the guide members 140, so that the guide member 140 can be slidably coupled therethrough.

The inspection apparatus of the present invention further includes a current inspection unit (not shown) for conducting a current inspection of the pressurized cell pouch 1. The current tester applies a voltage to the plurality of cell pouches 1 through the electrode module 150 to be described later, and measures the current of the cell pouches 1. The current inspection unit may include: a power supply for applying a voltage to reach a predetermined range of voltages with respect to the cell pouch pressurized by the pressure panel; And a current measuring unit measuring a current value flowing through the cell pouch. The current inspection unit and the electrode module are electrically connected through a cable, an FPCB or various conductors.

An inspection apparatus of the present invention includes: an electrode module connected to an electrode terminal of each of a plurality of secondary battery cell pouches positioned in the gap to apply or receive current; It includes more.

The electrode module 150 serves to electrically connect the current inspecting unit and the cell pouch 1. The electrode module may or may not be fixed to the inspection apparatus of the present invention.

3 to 7, a plurality of electrode modules 150 according to an embodiment of the present invention are installed between the pressure panels 130 and fixed to the pressure panels 130 together with the pressure panels 130. I can move it. The electrode module 150 is connected to each of the electrode terminals 1a (shown in FIGS. 10 and 12) of the secondary battery cell pouches 1 (shown in FIGS. 9 to 12) located in the gap and applied from the current inspection unit. Power is applied to the cell pouch, or the current of the cell pouch is transferred to the current inspection unit.

Electrode module 150 according to an embodiment of the present invention is fixed to one side of the pressing panel 130 and the fixing member 151, is fixed to the fixing member 151, the interval is adjusted in the interval adjustment direction is adjusted The electrode actuator 153 having the movable tip 153a, the stationary piece 154 fixed to each of the movable tip 153a, and the stationary piece 154 are provided to face each other, so that the electrode actuator 153 The driving unit may include an electrode connection part 155 which is in surface contact with both side surfaces of the electrode part 1a (shown in FIGS. 10 and 12) of the secondary battery cell pouch 1 (shown in FIGS. 9 to 12). The electrode connecting portion 155 may be provided with a contact portion 155a in which embossing is formed at a contact portion with the electrode terminal 1a so as to be accurately connected to the electrode terminal 1a of the secondary battery cell pouch 1.

The electrode module 150 may be installed in the mounting groove 135 formed in the pressing panel 130, and the guide hole 151a extending in the width direction of the secondary battery cell pouch 1 is fixed to the fixing member 151. It may be formed, the fixed position is adjustable in the width direction in the pressure panel 130 by the fixing bolt 152 is inserted into the desired position in the guide hole (151a) screwed to the inside of the mounting groove 135. have. In addition, the fixing member 151 may be provided with a knob 151b protruding from a gap between the pressing panels 130 in order to grip when adjusting the gap. Here, for the operation of the movable tip 153a, the electrode actuator 153 may use a pneumatic cylinder, or as another example, a solenoid actuator. In addition, various driving means may be used.

3 and 8, the pressure driving unit 160 presses the secondary battery cell pouches 1 (shown in FIGS. 9 to 12) between the pressing panels 130 by moving the movable member 120 back and forth on both sides. And to release the pressure, for this purpose, it can be configured in various ways, including being configured to use the reciprocating motion of the cylinder, or to convert the rotational force of the motor into a linear motion.

For example, as in this embodiment, a drive motor 161 that provides a driving force, a drive timing pulley 162 rotated by the drive motor 161, and guides that are respectively installed side by side on both sides of the drive timing pulley 162. From the driving timing pulley 162 to the driven timing pulley 164 to be guided by the pulley 163, the driven timing pulley 164 which are respectively installed side by side of the driving timing pulley 162, and the guide pulley 163. The timing belt 165 and the timing timing pulley 164 connected to each other are fixed to rotate together in each of the driven timing pulleys 164, and are screwed through both sides of the movable member 120, and a through hole of the pressure panel 120. 134 may include a lead screw 166 inserted to have a clearance, and further, the exterior may be wrapped by the casing 167.

The driving motor 161 may be fixed by a bracket or the like on the bottom panel 167a forming the bottom of the casing 167 on the base frame 181, and the secondary battery cell pouch 1 (FIG. 9 to FIG. 9) may be fixed at a predetermined range of pressure. 12 may be configured as a servo motor, a stepping motor, or the like capable of controlling the amount of rotation to pressurize.

On the other hand, since the range of the pressing force is different depending on the type or specification of the secondary battery cell pouch 1, an appropriate pressure may be selected to determine whether the separator is damaged by the insulation between the electrode portions 1a or the amount of energization. . The driving timing pulley 162, the guide pulley 163, and the driven timing pulley 164 may be rotatably installed on the support frame 182. On the other hand, the movable member 120 may be provided with a ball screw 121, for example, for screwing the lead screw 166.

3 to 5, the guide part for guiding the entry and exit of the secondary battery cell pouch 1 (shown in FIGS. 9 to 12) with respect to the gap between the pressure panels 130 is disposed on an upper end of the pressure panel 130. 170 may be installed. The guide unit 170 supports and supports the support shaft 171 installed vertically upward from the upper end of the pressure panel 130 for smooth and safe entry and exit of the secondary battery cell pouch 1 between the pressure panels 130. The guide tip 172 is provided to reduce the width toward the upper side on the shaft 171, and the upper portion is hinged by hinge pins 173a respectively on both sides of the guide tip 172 to be disposed toward the gap side, the center May include a hinge guide 173 having a “◁” shape such that the protrusion protrudes toward the gap side.

The inspection apparatus of the present invention further includes a control unit connected to the pressure driving unit, the electrode module, and the current inspection unit to control the operation, and determine whether or not the defect by comparing the current value and the reference value measured by the current inspection unit. Here, the current value may mean an average value of currents measured for 2 to 10 seconds. In addition, the controller may compare the current value of the secondary battery cell pouch measured by the current inspection unit with a reference value of a predetermined good product, and perform the determination according to a predetermined value, and through the display unit (not shown), the secondary battery cell pouch. (1) A positive result can be displayed corresponding to each arrangement position.

1 to 3, the plurality of secondary battery cell pouch simultaneous inspection apparatus 100 according to an exemplary embodiment of the present invention may include a secondary battery cell pouch 1 on the support frame 182 of the frame 180. Sensors 211 and 212 for detecting the entrance and exit of the 9 to 12) may be further provided, for example, a light emitting device for outputting light of a predetermined wavelength, and a plurality of secondary batteries by receiving the light of the light emitting device It may be configured as a light receiving element for outputting a detection signal to a control unit (not shown) that performs the control of the cell pouch simultaneous inspection apparatus 100.

In addition, the control unit may control the operation of the plurality of secondary battery cell pouch simultaneous inspection apparatus 100 according to a given process, which will be described below.

The operation of a plurality of secondary battery cell pouch simultaneous inspection device according to the present invention will be described.

As shown in FIG. 3, the movable member 120 is retracted by the operation of the pressure driving unit 160 so that the pressure panel 130 opens the gap between each other by the link link 131 as much as possible, and then FIGS. 9 and FIG. As in 10, a plurality of secondary battery cell pouches 1 are gripped by each gripper (not shown) to be mounted at each gap between the pressure panels 130. In this case, the electrode module 150 maintains the gap between the electrode connecting portions 155 as far as possible so that the electrode terminal 1a of the secondary battery cell pouch 1 is positioned between the electrode connecting portions 155.

As shown in FIGS. 11 and 12, when the secondary battery cell pouch 1 is mounted between the pressure panels 130, the movable member 120 is advanced by the operation of the pressure driving unit 160 to move between the pressure panels 130. The interval of is reduced, so that the secondary battery cell pouch 1 is simultaneously pressed. Due to such pressurization, the secondary battery cell pouch 1 does not properly insulate the positive electrode and the negative electrode because the positive electrode and the negative electrode contact when the internal membrane is damaged.

In addition, the electrode module 150 allows the electrode connecting portion 155 to be electrically connected to the electrode terminal 1a of the secondary battery cell pouch 1 by the operation of the electrode actuator 153, and then the cable from the current measuring unit. Or current provided using FPCB or various conductors is provided to the electrode terminal 1a through the electrode connecting portion 155, and the electrode connecting portion 155 from the secondary battery cell pouch 1 through the other electrode terminal 1a. The amount of current received is transmitted to the current measuring unit, and the controller determines whether the secondary battery cell pouch 1 is good or not according to whether the measured value according to the measured amount of electric current or insulation degree corresponds to a predetermined standard. May be displayed for each of the secondary battery cell pouches 1 through a display unit or a data output device.

The inspection apparatus of the present invention, by pressing the cell pouch (1) so that the positive electrode and the negative electrode of the damaged portion of the separator is in physical contact with each other to induce energization of the positive electrode and the negative electrode, the electrode module (1) When a constant voltage of a predetermined range is applied through the electrode connection part 155 of 150, a cell pouch in which the separator is damaged generates a leakage current due to a tendency to maintain the applied voltage, and a cell in which the separator is damaged due to the leakage current. Since the pouch has a larger measured current value than the normal cell pouch, the cell pouch is pressurized and the current is measured to detect a cell pouch in which the measured current value exceeds a predetermined value as a defective cell due to a membrane damage. Will be.

After the inspection of the secondary battery cell pouch 1, the electrode module 150 allows the electrode 155 to be separated from the electrode portion 1a of the secondary battery cell pouch 1 by the operation of the electrode actuator 153. Afterwards, the gap between the pressure panel 130 is opened as much as possible by the operation of the pressure driving unit 160 to release the pressure on the secondary battery cell pouch 1, and thus, the gap between the pressure panel 130. From the secondary battery cell pouch may be unloaded by each gripper for subsequent processing.

In particular, the inspection apparatus of the present invention is a rechargeable battery cell pouch or SOC (State of charge) of 5% or less in an uncharged state, in which the electrode and the separator are sufficiently impregnated with the electrolyte, and before precharge or initial charge or primary charge. It is preferable to inspect the secondary battery cell pouch near the discharge state.

When the secondary battery cell pouch is charged, an SEI film and a gas having electrical nonconductive properties are formed at the interface of the electrode, which causes an increase in contact resistance between the positive electrode and the negative electrode, making it difficult to detect fine separator defects. In addition, since the secondary battery generally has a large voltage change rate per capacity within the SOC range of 5% or less, when a constant voltage is applied to an uncharged secondary battery cell pouch or a secondary battery cell pouch of SOC 5% or less. The applied voltage can be reached within a few seconds to several tens of seconds, and the time for detecting a defective battery can be significantly shortened.

As described above, the present invention has been described with reference to the accompanying drawings, but various modifications may be made without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be defined by the claims and their equivalents.

[Description of the code]

1: secondary battery cell pouch 1a: electrode terminal

110: support member 120: movable member

121: ball screw 130: pressure panel

131: connection link 131a: guide hole

132: connecting pin 133: sliding coupling member

134: through hole 135: mounting groove

136: pressure pad 137: pressure piece

138: support roller 138a: roller coupling portion

140: guide member 150: electrode module

151: fixing member 151a: extension hole

151b: Knob 152: Fixing bolt

153: electrode actuator 153a: movable tip

154: fixing piece 154a: mounting groove

155: electrode connection portion 155a: contact portion

160: pressure driving unit 161: drive motor

162: driving timing pulley 163: guide pulley

164: driven timing pulley 165: timing belt

166: lead screw 167: casing

167a: bottom panel 170: guide part

171: support shaft 172: guide tip

173: Hinge guide 173a: Hinge pin

180: frame 181: base frame

182: support frame 190: elastic support

191: fixing panel 192: compression spring

211,212: detector

Claims (15)

1. A support member installed for support;

   A movable member installed to face the support member;

   A plurality of side by side between the support member and the movable member is installed, coupled to each other by the front and rear movement of the movable member is coupled to each other, the cell pouch of the secondary battery is inserted into the gap formed between each A pressure panel;

   A guide member for guiding the pressing panel to move in the direction of the gap adjustment; And

   And a pressurizing driver configured to pressurize and depressurize the secondary battery cell pouches between the pressing panels by moving the movable member back and forth on both sides thereof, including a plurality of secondary battery cell pouches.
2. The method of claim 1,

   A current inspecting unit applying a voltage to the secondary battery cell pouch and measuring a current; Further comprising a plurality of secondary battery cell pouch simultaneous inspection device.
3. The method of claim 1,

   An electrode module connected to each of the electrode terminals of the secondary battery cell pouch disposed in the gap to apply or receive current; Further comprising, a plurality of secondary battery cell pouch simultaneous inspection device.
4. The method of claim 1,

   The pressure panel,

   The connecting links having guide holes extending in the direction of adjusting the spacing are fixed to both sides, and the connecting pins inserted into the guide holes formed in the connecting links of the other pressing panels facing the gap are respectively provided at both sides. Is coupled to each other so that the gap is adjusted by the connecting link and the connecting pin is arranged alternately up and down, the guide member is slidably coupled is provided, the lower portion of the plurality of roller coupling A plurality of secondary battery cell pouch simultaneous inspection device is provided so that the support roller is supported on the ground by the unit.
5. The method of claim 3, wherein

   The plurality of electrode modules, the plurality of secondary battery cell pouch simultaneous inspection device, characterized in that installed in each of the pressure panel, and fixed to the pressure panel to move with the pressure panel.
6. The method of claim 5, wherein the electrode module,

   A fixing member fixed to one side of the pressing panel;

   An electrode actuator fixed to the fixing member, the electrode actuator having a movable tip disposed in the gap adjusting direction to adjust a gap;

   Fixing pieces fixed to each of the movable tips; And

   An electrode connection part provided on each of the fixing pieces so as to face each other, the surface contact being in surface contact with both sides of the electrode terminals of the secondary battery cell pouch by driving the electrode actuator; Including, a plurality of secondary battery cell pouch simultaneous inspection device.
7. The method of claim 6,

   The electrode module,

   Is installed in the mounting groove formed in the pressure panel, the fixing member is formed with a guide hole extending in the width direction of the secondary battery cell pouch, is inserted into a desired position in the guide hole is screwed inside the mounting groove A plurality of secondary battery cell pouch simultaneous inspection device that is fixed in the width direction by a fixed bolt is fastened.
8. The method of claim 2,

   The current inspection unit may include a power supply for applying a voltage such that the cell pouch pressurized by the pressure panel reaches a voltage in a predetermined range; And

   A current measuring unit measuring a current value of the cell pouch; A plurality of secondary battery cell pouch simultaneous inspection device comprising a.
9. The method of claim 1,

   The pressure driving unit,

   A drive motor providing a driving force;

   A drive timing pulley rotated by the drive motor;

   Guide pulleys respectively installed side by side on both sides of the driving timing pulley;

   Driven timing pulleys which are respectively installed side by side on both sides of the driving timing pulley;

   A timing belt connected to the driven timing pulley from the driving timing pulley so as to be guided to the guide pulley and transmitting a rotational force; And

   A lead screw fixed to each of the driven timing pulleys so as to rotate together, screwed through both sides of the movable member, and inserted into the through hole of the pressure panel;

   Including, a plurality of secondary battery cell pouch simultaneous inspection device.
10. The method of claim 1,

    A plurality of secondary battery cell pouch simultaneous inspection apparatus further comprises a guide unit installed to guide the entry and exit of the secondary battery cell pouch with respect to the gap on the pressure panel.
11. The method of claim 1,

    The guide unit,

    A support shaft installed vertically upward from an upper end of the pressing panel;

    A guide tip provided on the support shaft so as to decrease in width upward; And

    Hinge hinges each having an upper portion hinged to both sides of the guide tip to be disposed toward the gap side, and having a “◁” shape so that a central portion protrudes toward the gap side;

    Including, a plurality of secondary battery cell pouch simultaneous inspection device.
12. The method of claim 1,

    Further comprising an elastic support for elastically supporting the support member to be restored to the pressing panel side,

    The elastic support portion,

    A fixed panel fixed to face the support member; And

    A compression spring inserted into the guide member to be positioned between the fixing panel and the support member;

    Including, a plurality of secondary battery cell pouch simultaneous inspection device.
13. The method of claim 2,

    Respectively connected to the pressure driving unit and the current inspection unit to control each operation of the pressure driving unit and the current inspection unit;

    A plurality of secondary battery cell pouch simultaneous inspection device further comprising a control unit for determining whether or not by comparing the current value and the reference value measured by the current inspection unit.
14. The method of claim 13,

    The control unit, by comparing the average value and the reference value of the current value measured by the current inspection unit for 2 to 10 seconds, a plurality of secondary battery cell pouch simultaneous inspection device, characterized in that it determines whether or not.
15. The method of claim 1,

    A plurality of secondary battery cell pouch simultaneous inspection device, characterized in that it comprises a pressing pad or pressing piece attached to one or both sides of the pressing panel.

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